Evaluate
\sqrt{7}-\sqrt{2}-2\sqrt{5}\approx -3.240598206
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-\sqrt{2}-4\sqrt{5}+\sqrt{7}+2\sqrt{5}
Combine 3\sqrt{2} and -4\sqrt{2} to get -\sqrt{2}.
-\sqrt{2}-2\sqrt{5}+\sqrt{7}
Combine -4\sqrt{5} and 2\sqrt{5} to get -2\sqrt{5}.
Examples
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Simultaneous equation
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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Limits
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